Liquid ring compressor device for petroleum and natural gas platform

Abstract

The utility model discloses a liquid ring compressor device for an oil and gas platform. The liquid ring compressor device comprises a shell, a main shaft, a first impeller, a second impeller, a middle wall shaft sleeve, a deep groove ball bearing and a cylindrical roller bearing. According to the liquid ring compressor device for the petroleum and natural gas platform, the two-stage impeller design is adopted, and the gas displacement of the liquid ring compressor device can be increased, so that the overall compression efficiency is improved, gas can be better and uniformly distributed and compressed, the loss of gas in the compression process is reduced, and the problems of abrasion and overheating of a single impeller are reduced; therefore, the service life of equipment is prolonged. And the middle wall shaft sleeve is arranged, so that parts of the liquid ring compressor device are prevented from being abraded. And the positioning part used for positioning the main shaft is arranged on the first impeller, so that installation and positioning between the first impeller and the main shaft are facilitated, meanwhile, through the forms of the deep groove ball bearing and the cylindrical roller bearing, the gap is conveniently adjusted, meanwhile, the stability is enhanced, the installation precision is improved, and the field use condition is met.

Description

Technical Field

[0001] This utility model relates to the field of liquid ring compressors, and more particularly to a liquid ring compressor device for oil and gas platforms. Background Technology

[0002] Liquid ring compressors have wide applications in various industrial fields. Their operation primarily utilizes a liquid ring as a sealing and cooling medium to achieve functions such as gas compression, pumping, and vacuum extraction, meeting diverse and complex gas handling needs. Liquid ring compressors are typically categorized as heavy-duty equipment, requiring them to withstand significant mechanical and thermal stresses during operation, thus highlighting their nature as heavy-duty equipment.

[0003] Under the unique operating conditions of oil and gas platforms, heavy-duty liquid ring compressors have also encountered some problems. Abnormal weather conditions such as typhoons, heavy rain, and strong winds, as well as the unstable volume and high impurity content of the inlet recovery vent air, have all become significant factors affecting equipment vibration. These special operating conditions lead to an increased frequency of equipment start-ups and shutdowns, posing a significant challenge to the stable operation of the equipment.

[0004] The original equipment had the following shortcomings during use: the natural gas it transmitted contained solid impurities such as rust, a situation that was not fully considered during the design and installation of the original equipment, leading to rotor and stator wear and preventing long-term stable operation. The design was based on experience with water ring vacuum pumps, and the original equipment did not consider the existence of axial forces in its bearing selection. The axial movement of the liquid ring compressor shaft, i.e., rotor axial displacement, may cause a series of equipment failures, including mechanical seal leakage and bearing overheating. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a liquid ring compressor device for oil and gas platforms.

[0006] The technical solution adopted by this utility model to solve its technical problem is: to construct a liquid ring compressor device for oil and gas platforms, which includes a housing, a main shaft, a first impeller, a second impeller, an intermediate wall bushing, a deep groove ball bearing, and a cylindrical roller bearing;

[0007] The main shaft is installed inside the housing, with the direction from the first end of the main shaft toward its second end as the first direction. The first impeller, the intermediate wall bushing, and the second impeller are sequentially sleeved on the outside of the main shaft along the first direction. The first impeller is provided with a positioning part for positioning the main shaft.

[0008] The deep groove ball bearing is sleeved on the outer side of the first end of the main shaft, and the cylindrical roller bearing is sleeved on the outer side of the second end of the main shaft.

[0009] In some embodiments, the axial length of the first impeller is 120 mm to 130 mm, the axial length of the second impeller is 65 mm to 75 mm, and the axial length of the intermediate wall bushing is 65 mm to 70 mm.

[0010] In some embodiments, the liquid ring compressor device further includes a front cover and a rear cover, the front cover and the rear cover being connected by tie rod bolts.

[0011] In some embodiments, the front cover is provided with an air inlet, and the rear cover is provided with an exhaust outlet.

[0012] In some embodiments, the liquid ring compressor device further includes a first positioning element, an intermediate wall, and a second positioning element;

[0013] The first positioning member, the intermediate wall, and the second positioning member are all connected to the housing. The first positioning member and the intermediate wall are separately disposed at both ends of the first impeller, and the second positioning member and the intermediate wall are separately disposed at both ends of the second impeller.

[0014] In some embodiments, the outer wall surface of the intermediate wall bushing abuts against the inner wall surface of the intermediate wall.

[0015] In some embodiments, the outer wall surface of the intermediate wall bushing is provided with a bidirectional spiral groove structure.

[0016] In some embodiments, the spindle is provided with a keyway, and the length between the two ends of the keyway is 65mm to 75mm.

[0017] In some embodiments, a retaining ring is connected to the second end of the spindle, and the retaining ring is connected to the spindle by fasteners.

[0018] In some embodiments, the liquid ring compressor device further includes a control component, which includes a motor, a soft starter, a motor protector, and a circuit breaker.

[0019] The present invention offers the following advantages: The liquid ring compressor unit for oil and gas platforms employs a two-stage impeller design, increasing the compressor's discharge capacity and thus improving overall compression efficiency. This allows for better and more uniform gas distribution and compression, reducing gas losses during compression, minimizing wear and overheating of individual impellers, and extending the equipment's service life. An intermediate wall bushing prevents wear on the components of the liquid ring compressor unit. Furthermore, a positioning part on the first impeller facilitates the installation and positioning of the first impeller and the main shaft. The use of deep groove ball bearings and cylindrical roller bearings enhances stability and improves installation accuracy, meeting on-site operating conditions. This liquid ring compressor unit improves operational stability and ensures efficient resource recovery for the natural gas platform. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of a liquid ring compressor device for an oil and gas platform according to some embodiments of this utility model;

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a schematic diagram of the structure of the control component in some embodiments of this utility model. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0025] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] Please see Figures 1 to 3 This invention relates to a liquid ring compressor device for an oil and gas platform, as described in some embodiments of the present invention. The device includes a housing 11, a main shaft 12, a first impeller 13, a second impeller 14, an intermediate wall bushing 15, a deep groove ball bearing 16, and a cylindrical roller bearing 17. The main shaft 12 is installed inside the housing 11. With the direction from the first end of the main shaft 12 towards its second end as a first direction, the first impeller 13, the intermediate wall bushing 15, and the second impeller 14 are sequentially sleeved on the outside of the main shaft 12 along the first direction. The first impeller 13 has a positioning part 131 for positioning the main shaft 12. The deep groove ball bearing 16 is sleeved on the outside of the first end of the main shaft 12, and the cylindrical roller bearing 17 is sleeved on the outside of the second end of the main shaft 12. The first impeller 13, the intermediate wall bushing 15, the second impeller 14, and the main shaft 12 are coaxially arranged, with the first impeller 13 being a long impeller and the second impeller 14 being a short impeller.

[0027] Understandably, the liquid ring compressor unit for oil and gas platforms employs a two-stage impeller design, which increases the discharge capacity of the liquid ring compressor unit, thereby improving the overall compression efficiency. This allows for better and more even distribution and compression of gas, reducing gas losses during compression, minimizing wear and overheating of individual impellers, and extending the equipment's service life. The intermediate wall bushing 15 prevents wear on the components of the liquid ring compressor unit. Furthermore, the positioning part 131 on the first impeller 13 facilitates the installation and positioning between the first impeller 13 and the main shaft 12. The use of deep groove ball bearings 16 and cylindrical roller bearings 17 enhances stability and improves installation accuracy while facilitating clearance adjustment, meeting on-site operating conditions. This liquid ring compressor unit improves operational stability and ensures the resource recovery efficiency of the natural gas platform.

[0028] The first impeller 13 has an axial length of 120mm to 130mm, preferably 125mm. The second impeller 14 has an axial length of 65mm to 75mm, preferably 70mm. The intermediate wall bushing 15 has an axial length of 65mm to 70mm, preferably 68mm. The axial lengths of these components are designed based on the maximum torque during startup of the liquid ring compressor, ensuring that the first impeller 13 and the second impeller 14 are not easily disengaged, thus meeting the requirements of on-site operation.

[0029] The liquid ring compressor unit also includes a front cover 18 and a rear cover 19, which are connected by tie rod bolts 20. The front cover 18 has an inlet 21, and the rear cover 19 has an outlet 22. When the impeller rotates to the inlet 21, the volume increases, creating a low-pressure area, and gas is drawn into the volume. As the impeller continues to rotate, the volume decreases, and the gas is compressed. When the volume reaches its minimum, the high-pressure gas is discharged through the outlet 22. Furthermore, to address the presence of impurities such as rust in natural gas, the liquid ring compressor unit increases the shaft clearance and rechecks the clearance after installation. The front cover 18 and rear cover 19 are connected using extended tie rod bolts 20 to prevent uneven clearance.

[0030] The liquid ring compressor unit also includes a first positioning element 23, an intermediate wall 24, and a second positioning element 25. The first positioning element 23, the intermediate wall 24, and the second positioning element 25 are all connected to the housing 11. The first positioning element 23 and the intermediate wall 24 are separately disposed at both ends of the first impeller 13, and the second positioning element 25 and the intermediate wall 24 are separately disposed at both ends of the second impeller 14. The intermediate wall 24 serves to separate the two pump chambers. Simultaneously, the first positioning element 23 and the intermediate wall 24 provide positioning for the first impeller 13, and the second positioning element 25 and the intermediate wall 24 provide positioning for the second impeller 14.

[0031] Furthermore, the outer wall surface of the intermediate wall sleeve 15 abuts against the inner wall surface of the intermediate wall 24, and the outer wall surface of the intermediate wall sleeve 15 is provided with a bidirectional spiral groove structure. Understandably, the gap between the intermediate wall sleeve 15 and the intermediate wall 24 will cause some gas backflow. The bidirectional spiral groove structure on the outer wall surface of the intermediate wall sleeve 15, the small holes on the contact plane between the intermediate wall 24 and the impeller, and the small holes on the inner wall through which the intermediate wall sleeve 15 passes, can guide water in the pump chamber to the intermediate wall sleeve 15. Through the rotation of the main shaft 12, the water is further guided to both ends of the intermediate wall sleeve 15 through the bidirectional spiral groove structure to form a seal. At the same time, it can also cool the hub part in contact with both ends of the intermediate wall sleeve 15. Meanwhile, the bidirectional spiral groove structure also reduces the contact area with the intermediate wall 24, reducing wear.

[0032] In addition, the spindle 12 is provided with a keyway 121, the length between the two ends of the keyway 121 is 65mm to 75mm, and the length between the two ends of the keyway 121 is preferably 70mm. The keyway 121 can be fitted with a flat key, and by increasing the length of the flat key, the stability between transmissions is enhanced.

[0033] A retaining ring 26 is connected to the second end of the spindle 12. The retaining ring 26 is connected to the spindle 12 by a fastener 261. The retaining ring 26 provides a positioning function for the spindle 12.

[0034] The liquid ring compressor unit also includes a control assembly, which includes a motor 27, a soft starter 28, a motor protector 29, and a circuit breaker 30. Specifically, the motor 27 is a liquid ring compressor motor with rated parameters of 380V, 110kW, and 195.8A. The soft starter 28 can significantly reduce the current surge during motor 27 startup, thereby reducing the capacity requirements of the power distribution equipment and avoiding increased equipment investment due to excessive current. In addition, the soft starter 28 can effectively reduce the starting stress of the motor and load equipment by controlling the conduction angle of the thyristor, extending their service life. In this embodiment, by installing the soft starter 28, the starting current can be reduced to 600A, which is 4.6 times the normal rated current of 131A. The starting torque is also reduced from the original maximum of 19 times to 4.6 times, and the vibration value at the drive end is reduced from 6mm / s to about 3mm / s. The motor protector 29 provides multiple protection functions, including overcurrent, undercurrent, phase loss, locked rotor, short circuit, overvoltage, undervoltage, leakage current, three-phase imbalance, overheating, and grounding protection, ensuring that the motor 27 will not be damaged under various abnormal conditions. The circuit breaker 30 can be a 250A MCCB circuit breaker. Alternatively, an electronic thermal relay can be used for overload protection. The current adjustment range of the electronic thermal relay is 60–302A, the short circuit protection setting of the circuit breaker is 10In (2500A), and the electronic thermal relay protection setting input to the rated current of the motor 27 is 196A, meeting the design requirements.

[0035] Additionally, stress at the connection points between the pipelines and the liquid ring compressor can be relieved by re-aligning and welding the flange holes of the inlet and outlet pipelines. Stable equipment operation can also be maintained by optimizing process parameters, keeping the circulating fluid clean, and improving coaxiality during operation.

[0036] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A liquid ring compressor unit for an oil and gas platform, characterized in that, It includes a housing (11), a main shaft (12), a first impeller (13), a second impeller (14), an intermediate wall bushing (15), a deep groove ball bearing (16), and a cylindrical roller bearing (17); The main shaft (12) is installed inside the housing (11). The direction from the first end of the main shaft (12) to its second end is taken as the first direction. The first impeller (13), the intermediate wall bushing (15), and the second impeller (14) are sequentially sleeved on the outside of the main shaft (12) along the first direction. The first impeller (13) is provided with a positioning part (131) for positioning the main shaft (12). The deep groove ball bearing (16) is sleeved on the outer side of the first end of the main shaft (12), and the cylindrical roller bearing (17) is sleeved on the outer side of the second end of the main shaft (12).

2. The liquid ring compressor unit for oil and gas platforms according to claim 1, characterized in that, The first impeller (13) has an axial length of 120 mm to 130 mm, the second impeller (14) has an axial length of 65 mm to 75 mm, and the intermediate wall bushing (15) has an axial length of 65 mm to 70 mm.

3. The liquid ring compressor unit for oil and gas platforms according to claim 1, characterized in that, The liquid ring compressor device also includes a front cover (18) and a rear cover (19), which are connected by tie rod bolts (20).

4. The liquid ring compressor unit for oil and gas platforms according to claim 3, characterized in that, The front cover (18) is provided with an air inlet (21), and the rear cover (19) is provided with an exhaust outlet (22).

5. The liquid ring compressor unit for oil and gas platforms according to claim 1, characterized in that, The liquid ring compressor device further includes a first positioning element (23), an intermediate wall (24), and a second positioning element (25); The first positioning element (23), the intermediate wall (24) and the second positioning element (25) are all connected to the housing (11). The first positioning element (23) and the intermediate wall (24) are separately disposed at both ends of the first impeller (13), and the second positioning element (25) and the intermediate wall (24) are separately disposed at both ends of the second impeller (14).

6. The liquid ring compressor unit for oil and gas platforms according to claim 5, characterized in that, The outer wall surface of the intermediate wall bushing (15) abuts against the inner wall surface of the intermediate wall (24).

7. The liquid ring compressor unit for oil and gas platforms according to claim 1, characterized in that, The outer wall surface of the intermediate wall bushing (15) is provided with a bidirectional spiral groove structure.

8. The liquid ring compressor unit for oil and gas platforms according to claim 1, characterized in that, The spindle (12) is provided with a keyway (121), and the length between the two ends of the keyway (121) is 65mm to 75mm.

9. The liquid ring compressor unit for oil and gas platforms according to claim 1, characterized in that, A retaining ring (26) is connected to the second end of the main shaft (12), and the retaining ring (26) is connected to the main shaft (12) by a fastener (261).

10. The liquid ring compressor unit for oil and gas platforms according to claim 1, characterized in that, The liquid ring compressor unit also includes a control component, which includes a motor (27), a soft starter (28), a motor protector (29), and a circuit breaker (30).

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